First of all, the difference between the lifting and the bearing capacity of both the hook and the grabber can be used as the lifting device of the crane.
Under normal circumstances, the hook crane is a direct hanging items, hooks and heavy objects linked through the rope hook, tied to achieve, mostly for the lifting of the whole heavy objects, need to be pre-bundled or packaged Heavy objects and so on.
However, grab bucket cranes are used to crawl items, the relationship between grapples and heavy objects is directly bite or load to achieve, and therefore used for direct loading and unloading of bulk material, or the direct crawling of the material, without the need for heavy objects Pre-binding or packing and other operations.
Followed by a different configuration on the hoisting mechanism
Clamshell crane is due to manipulation of the grab bucket opening and closing, the crane needs to have two sets of corresponding traction mechanism, usually adopts double drum winch to separate support grab opening and closing and displacement. While the hook crane only needs a set of traction mechanism to achieve the displacement of the hook is enough, without the need to configure a dual-roll winch. However, if it is a double crane with its own configuration of the crane type, it is a different matter.
Grab bucket cranes are used in the field of ordinary hook cranes to complete the work to capture the majority of bulk materials, the general use of custom way to sell, and general crane is different, grab crane also need to determine the volume of grab bucket.
In daily use, the more common crane grappling form is the shellfish and multi-flap type. The shellfish is used to complete the gravel, coal, mine, earthwork, and so on. It is used in the field of sand, coal, mine and infrastructure. Stone, and soil and other bulk material crawling, lifting work. Wood, straw grapples are also a kind of shellfish grab can be used in the timber factory to grasp the logs, straw processing plant used to grab straw bundles.
The multi-flap grab is controlled by the opening and closing of a plurality of jaws to control the crawling material for the scrap steel scraping and refining work in the steel mill, the bulk waste of the garbage disposal site and the construction site, And the handling of the car, the car recycling field for car disintegration, refining and recycling work, bucket teeth can be replaced, and the use of high hardness wear-resistant steel, so as to ensure long service life; valve shell can be selected according to different working environment; Flap, semi-closed flap, broadly flap and narrowly flap.
Grab bucket bridge crane and ordinary hook bridge crane main difference is that the former is in the bridge crane under the hook to install the grab, through the control of the opening and closing of the hook to complete the hook cannot complete the material crawling operations.